Improvement in machines and processes for making veneer pipes



2 SheetvsShee t 1.

R. M. C. BROAS.

MACHINE AND PROCESS FOR MAKING VENEER PIPE. No.171,347. Patented 1m. 21, 1875,

. WITNESSES I INVENTOR W% RA-Label. m. c. 191m).

" I ATTORNEYS N.PETERS, PHOTGUTHOGRAPHER, WASHVNGTON. D. Q

2Sheets-Sheet 2. R. M. C. BROAS. MACHINE AND PROCESS FOR MAKING VENEER PIPE. No.171,347. Patented 1m. 21, '1875.

INVENTOR ATTORNEYS Fay WITNESSES Mam/70W NJFETERS. PHOTO LTHOGRAPHER ASNI\GTON D C UNITED STATES PATENT ()rrxon RICHARD M. G. BROAS, OF JERSEY CITY, N. J ASSIGNOR OF TEIREE-FOURT EIS HIS RIGHT TO JACOB KOHLBERG AND THADDEUS H. WALSH, OF NEW YORK CITY, AND JOHN P. OULVER, OF JERSEY CITY, N. J.

IMPROVEMENT IN MASHINES AND PROCESSES FOR MAKING VENEER PIPES.

Specification forming part of Letters Patent N 0. 171,347, dated December 21,1875; application filed a I November 27, 1875.

CASE B.

.same, reference being bad to the annexed drawings, making a part of this specification. and to the .letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a rear view of my machine and Fig. 2 is a longitudinal vertical central sectional view thereof. Fig. 3 is a sectional detail view.

This invention has relation to improvements in machines for manufacturing pipes whichare composed exclusively of asphaltum and veneers of wood, or of asphaltum and veneers of wood in conjunction with paper or cloth.

The object of the invention is to produce compact and durable pipes, by so winding, ce-

' menting, and compressing them while being made that they will be identical in size, and their inner and outer surfaces concentric.

To this end the nature of the invention consists in the arrangement and novel construction of the various devices employed, whereby the desired results are absolutely attained, as will be hereinafter more fully explained and claimed.

In the annexed drawings, the letter A designates the frame of my improved machine, which is made of Wood, or of metal, or ofthe two combinedr This frame affords bearings for twosuitably-spaced bearing-rollers, B, which are preferably of metal, and are covered with a woven fabric of close texture, and, at a certain distance above the rollers B, for one or more similarly-constructedrollers, 0. Around these rollers is loosely passed an endless belt,

.D, which maybe of rubber or cloth, but is preferably made of canvas, as thelatter material absorbs and retains moisture better than any other sufficiently durable and strong substance. E designates a metallic tension-rolland its weight will then be lowered.

er, having its end bearings in slots a, formed 1n vertically-vibrating metallic guides I pivoted in any suitable manner to the frame, or

to the journals of the rear roller B, as shown I in 2. Tension-roller E is provided with an operating bail, F, extending above the frame A, and also with a weight-cylinder, Gr,

suspended from the journals of the same by means of rods or chains 11, for a purpose hereinafter explained. H represents a preferablymetallio pan, designed to hold water,'and suspended or attached to frame A under, and in close proximity to, bearing-rollers B. This pan contains a sponge-like material, II, of suitable size, which, during the operation of the' machine, will keep belt D sufficiently moist,

but will prevent any excess of moisture from being imparted thereto, thus preventing all drip. I represents a cylindriral metallic maudrel or former, which is preferably tubular, and is smoothly polished upon its outside. This mandrel is entirely detached from the rest of the machine-that is, it has no bearings, and is not journaled in any part of the frame.

When in use mandrel I will be first well oiled. The tension-roller E and its attached weight having been then raised, the said mandrel will then be placed against the face of the belt, and pushed into the opening between the bearing-rollers B. The tension-roller E front bearing-rollerB be then actuated by hand or any other suitable motor the slack of the endless belt I) will instantly be taken up by the tension-roller, and the said belt will be made to bind upon the cloth-covered outer surfaces of rollers B O, and of the mandrel I. A

cloth wrapper, 0, will then be'passed between the front bearing-roller B and the mandrel, the said wrapper having been previously wet, and will be rolled around the latter through the action of the beltD and rotation of bearingroller B. p

The form of treated veneers of wood, or of wood and cloth or paper of size suitable to produce a pipe ofthe desired length and thick- If the ness, is then inserted in the same manner as the canvas wrappercabove mentioned between the front bearing-roller and the mandrel.

As the mandrel revolves, the form is coiled around it by the action of the endless belt, and the opening betweenrollers B and E being verysmall in comparison with the diameter of the mandrel the form will make its own lap--that is, its inner end will lap under its body. At the same time the form will closely embrace the mandrel, and a closelyjointed compact pipe will be formed when the entire blank is taken up. During the formation of the pipe, the belt D being constantly Wet, the form will not adhere thereto, nor will it adhere to the mandrel-wrapper 0, for the same reason; consequently, when the pipe is completed, the mandrel may be taken from the machine by raising the tension-roller, and the pipe easily drawn off of the same. It is then thrown into a tank of water, where it will readily cool, and, upon cooling, the wrapper c Qwill fall from the interior of the tube of itself,

and may be readily withdrawn.

. In practice, as soon as the blank is once wound around the mandrel and the first lap is about to be made, a gas-pipe, J, containing a number of closely-spaced burners, i t", will be swung into the opening between them, and

:the gas will then be lighted, when a continn 'ous sheet of flame will be thrown toward the -mandrel, and another upon the form or blank. The heat from these flames serves a double purpose: that directed against the mandrel :dispels the moisture resulting from contact with the wet belt D, and the other, falling upi on the form as it enters the rolls, liquefies the asphaltum and causesan immediate adherence of the surfaces of the blank as fast as they are brought-into contact. The belt being wet, there is no danger of its being burnt by the Should any asphaltum drop upon the belt during the formation of the pipe, it will be removed by a scraper-bar, K, arranged,

' preferably, at the rear of the machine with which the belt is, during its movements,

- brought into contact.

As shown in Fig. 1, the mandrel is placed between guides F, when thrust into position,

so that, although it is not journaled, it will be held against all endwise displacement.

It is evident that the tension-roller E will move outwardly and upwardly from the mandrel as the pipe-blank winds about it, this being due to the fact that the said tension-roller is journaled in slots at of guides F.

It will also be evident that mandrels of different diameters may be used in the same machine, through this automatic adjustment, above stated, possessed by the said tensionroller.

The gas jets above mentioned, in lieu of being applied as above stated, may be thrown upon the under side of the form; but, for reafor the mandrel, I may .use a sleeve-coverin g when the said mandrel is of the species known as collapsing.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a mandrel, I, of an endless belt, D, nearly surrounding said mandrel, substantially as and for the purpose set forth.

2. In combination with a mandrel, I, the endless belt D, nearly surrounding the said mandrel and passing over bearing-rollers B, and a guide or' guideroller, O, substantially as specified.

3. In combination with the spaced bearingrollers B, and a guide roller or rollers, O, the

detached mandrel I, and the single endless belt D passing over the said rollers and nearly inclosing the said mandrel, substantially as specified.

4. In combination with a mandrel, I, bearing-rollers B, a guide roller or rollers, O, and an endless belt, D, the automatically-adjustable tension-roller E, for taking up automatically the slack of the belt and allowing the blank tobe Wound about the mandrel, and at the same time continuing an equal pressure, substantially as specified.

' 5. In combination with amandre], I, the detachable textile covering 0 adapted to be wound around the said mandrel, substantially as specified.

6. In combination with the detached unjournaled mandrel I, the lateral guides F, for holding the same against endwise displacement, substantially as specified.

7. In a machine for forming veneer and asphalt pipe, the combination, with the operating-belt D, of a scraper-bar, K, substantially as specified.

8. The combination, with the belt D, operating the forming and bearing rollers, of a pipeforming machine, the water-pan H, and sponge material L, placed beneath the said belt for M, substantially as specified, and forthe purposes set forth.

11. The process herein described of constructing pipe, by winding, by means of a damp endless belt, a blank around a mandrel, first covered with a wet textile band, to prevent adhesion, and drying the surface of said blank, and heating the asphalt covering by jets of flame, substantially as set forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

RICHARD M. G. BROAS. I Witnesses:

WALTER O. MASI, Bonner EVERETT. 

